Dear M******* in the Cooper S,
If you don't want someone getting into the left lane in front of you, don't leave a Prius-sized gap in front of you, then honk and close it after an actual Prius tries to get in.

Dear dumb fat bitch in the Saturn,
When you're in the left lane, and someone in front of you is stopped to take a left, you are supposed to check your mirrors and blind spot BEFORE you change lanes, NOT after you nearly sideswipe someone and get honked at by them.